The mostly long, wooden tables, tiling and lowish lighting have more the feel of a wine bar than a chicken joint (though the wine list is both short and grim). Meanwhile, a row of seats at the bar face the restaurant’s raison d’être: a vertical rotisserie oven, the first of its kind in the UK, in which chickens sit speared upright, rotating in front of the flames (a clock jack is the US term for a meat spit driven by springs or weights, a Tudor invention).